1 /* Java Wrappers to the MSG API. */
3 /* Copyright (c) 2007-2020. The SimGrid Team. All rights reserved. */
5 /* This program is free software; you can redistribute it and/or modify it
6 * under the terms of the license (GNU LGPL) which comes with this package. */
14 #include "simgrid/Exception.hpp"
15 #include "simgrid/msg.h"
16 #include "simgrid/plugins/energy.h"
17 #include "simgrid/plugins/file_system.h"
18 #include "simgrid/plugins/live_migration.h"
19 #include "simgrid/plugins/load.h"
20 #include "simgrid/simix.h"
22 #include "simgrid/s4u/Host.hpp"
24 #include "src/simix/smx_private.hpp"
27 #include "jmsg_as.hpp"
28 #include "jmsg_host.h"
29 #include "jmsg_process.h"
30 #include "jmsg_storage.h"
31 #include "jmsg_task.h"
32 #include "jxbt_utilities.hpp"
34 #include "JavaContext.hpp"
37 /* Shut up some errors in eclipse online compiler. I wish such a pimple wouldn't be needed */
44 /* end of eclipse-mandated pimple */
46 int JAVA_HOST_LEVEL = -1;
48 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
50 JavaVM *__java_vm = nullptr;
52 JNIEnv *get_current_thread_env()
54 using simgrid::kernel::context::JavaContext;
55 const JavaContext* ctx = static_cast<JavaContext*>(simgrid::kernel::context::Context::self());
62 void jmsg_throw_status(JNIEnv *env, msg_error_t status) {
65 jxbt_throw_time_out_failure(env, "");
67 case MSG_TRANSFER_FAILURE:
68 jxbt_throw_transfer_failure(env, "");
70 case MSG_HOST_FAILURE:
71 jxbt_throw_host_failure(env, "");
73 case MSG_TASK_CANCELED:
74 jxbt_throw_task_cancelled(env, "");
77 xbt_die("undefined message failed (please see jmsg_throw_status function in jmsg.cpp)");
81 /***************************************************************************************
82 * Unsortable functions *
83 ***************************************************************************************/
85 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Msg_getClock(JNIEnv*, jclass)
87 return (jdouble) MSG_get_clock();
90 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_init(JNIEnv* env, jclass, jobjectArray jargs)
92 env->GetJavaVM(&__java_vm);
94 simgrid::kernel::context::factory_initializer = &simgrid::kernel::context::java_factory;
95 const _jthrowable* exc = env->ExceptionOccurred();
97 env->ExceptionClear();
100 setlocale(LC_NUMERIC,"C");
104 argc += static_cast<int>(env->GetArrayLength(jargs));
105 xbt_assert(argc > 0);
107 // Need a static storage because the XBT layer saves the arguments in xbt::binary_name and xbt::cmdline.
108 static std::vector<std::string> args;
111 args.emplace_back("java");
112 for (int index = 1; index < argc; index++) {
113 jstring jval = (jstring)env->GetObjectArrayElement(jargs, index - 1);
114 const char* tmp = env->GetStringUTFChars(jval, 0);
115 args.emplace_back(tmp);
116 env->ReleaseStringUTFChars(jval, tmp);
119 std::unique_ptr<char* []> argv(new char*[argc + 1]);
120 std::transform(begin(args), end(args), argv.get(), [](std::string& s) { return &s.front(); });
121 argv[argc] = nullptr;
124 MSG_init(&argc2, argv.get());
125 xbt_assert(argc2 <= argc);
127 for (int index = 1; index < argc2; index++)
128 env->SetObjectArrayElement(jargs, index - 1, (jstring)env->NewStringUTF(argv[index]));
130 sg_vm_live_migration_plugin_init();
131 JAVA_HOST_LEVEL = simgrid::s4u::Host::extension_create(nullptr);
134 JNIEXPORT void JNICALL JNICALL Java_org_simgrid_msg_Msg_run(JNIEnv* env, jclass)
137 XBT_DEBUG("Ready to run MSG_MAIN");
138 msg_error_t rv = MSG_main();
139 XBT_DEBUG("Done running MSG_MAIN");
140 jxbt_check_res("MSG_main()", rv, MSG_OK,
141 xbt_strdup("unexpected error : MSG_main() failed .. please report this bug "));
143 XBT_INFO("MSG_main finished; Terminating the simulation...");
144 /* Cleanup java hosts */
145 xbt_dynar_t hosts = MSG_hosts_as_dynar();
146 for (unsigned long index = 0; index < xbt_dynar_length(hosts) - 1; index++) {
147 auto const* msg_host = xbt_dynar_get_as(hosts, index, msg_host_t);
148 jobject jhost = (jobject) msg_host->extension(JAVA_HOST_LEVEL);
150 jhost_unref(env, jhost);
152 xbt_dynar_free(&hosts);
154 /* Cleanup java storages */
155 for (auto const& elm : java_storage_map)
156 jstorage_unref(env, elm.second);
158 /* Display the status of remaining threads. None should survive, but who knows */
159 jclass clsProcess = jxbt_get_class(env, "org/simgrid/msg/Process");
160 jmethodID idDebug = jxbt_get_static_jmethod(env, clsProcess, "debugAllThreads", "()V");
161 xbt_assert(idDebug != nullptr, "Method Process.debugAllThreads() not found...");
162 env->CallStaticVoidMethod(clsProcess, idDebug);
165 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_createEnvironment(JNIEnv* env, jclass, jstring jplatformFile)
167 const char *platformFile = env->GetStringUTFChars(jplatformFile, 0);
169 MSG_create_environment(platformFile);
171 env->ReleaseStringUTFChars(jplatformFile, platformFile);
174 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Msg_environmentGetRoutingRoot(JNIEnv* env, jclass)
176 msg_netzone_t as = MSG_zone_get_root();
177 jobject jas = jnetzone_new_instance(env);
179 jxbt_throw_jni(env, "java As instantiation failed");
182 jas = jnetzone_ref(env, jas);
184 jxbt_throw_jni(env, "new global ref allocation failed");
187 jnetzone_bind(jas, as, env);
189 return (jobject) jas;
192 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_debug(JNIEnv* env, jclass, jstring js)
194 const char *s = env->GetStringUTFChars(js, 0);
196 env->ReleaseStringUTFChars(js, s);
199 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_verb(JNIEnv* env, jclass, jstring js)
201 const char *s = env->GetStringUTFChars(js, 0);
203 env->ReleaseStringUTFChars(js, s);
206 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_info(JNIEnv* env, jclass, jstring js)
208 const char *s = env->GetStringUTFChars(js, 0);
210 env->ReleaseStringUTFChars(js, s);
213 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_warn(JNIEnv* env, jclass, jstring js)
215 const char *s = env->GetStringUTFChars(js, 0);
217 env->ReleaseStringUTFChars(js, s);
220 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_error(JNIEnv* env, jclass, jstring js)
222 const char *s = env->GetStringUTFChars(js, 0);
224 env->ReleaseStringUTFChars(js, s);
227 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_critical(JNIEnv* env, jclass, jstring js)
229 const char *s = env->GetStringUTFChars(js, 0);
230 XBT_CRITICAL("%s", s);
231 env->ReleaseStringUTFChars(js, s);
234 static void java_main(int argc, char* argv[]);
236 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_deployApplication(JNIEnv* env, jclass, jstring jdeploymentFile)
238 const char *deploymentFile = env->GetStringUTFChars(jdeploymentFile, 0);
240 simgrid_register_default(java_main);
241 MSG_launch_application(deploymentFile);
244 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_energyInit() {
245 sg_host_energy_plugin_init();
248 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_fileSystemInit()
250 sg_storage_file_system_init();
253 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_loadInit() {
254 sg_host_load_plugin_init();
256 /** Run a Java org.simgrid.msg.Process
258 * If needed, this waits for the process starting time.
259 * Then it calls the Process.run() method.
261 static void run_jprocess(JNIEnv *env, jobject jprocess)
263 // wait for the process's start time
264 jfieldID jprocess_field_Process_startTime = jxbt_get_sfield(env, "org/simgrid/msg/Process", "startTime", "D");
265 jdouble startTime = env->GetDoubleField(jprocess, jprocess_field_Process_startTime);
266 if (startTime > MSG_get_clock())
267 MSG_process_sleep(startTime - MSG_get_clock());
269 //Execution of the "run" method.
270 jmethodID id = jxbt_get_smethod(env, "org/simgrid/msg/Process", "run", "()V");
271 xbt_assert((id != nullptr), "Method Process.run() not found...");
273 env->CallVoidMethod(jprocess, id);
274 if (env->ExceptionOccurred()) {
275 XBT_DEBUG("Something went wrong in this Java actor, forget about it.");
276 env->ExceptionClear();
277 XBT_ATTRIB_UNUSED jint error = __java_vm->DetachCurrentThread();
278 xbt_assert(error == JNI_OK, "Cannot detach failing thread");
279 simgrid::ForcefulKillException::do_throw();
283 /** Create a Java org.simgrid.msg.Process with the arguments and run it */
284 static void java_main(int argc, char* argv[])
286 JNIEnv *env = get_current_thread_env();
287 simgrid::kernel::context::JavaContext* context =
288 static_cast<simgrid::kernel::context::JavaContext*>(simgrid::kernel::context::Context::self());
290 //Change the "." in class name for "/".
291 std::string arg0 = argv[0];
292 std::replace(begin(arg0), end(arg0), '.', '/');
293 jclass class_Process = env->FindClass(arg0.c_str());
294 //Retrieve the methodID for the constructor
295 xbt_assert((class_Process != nullptr), "Class not found (%s). The deployment file must use the fully qualified class name, including the package. The case is important.", argv[0]);
296 jmethodID constructor_Process = env->GetMethodID(class_Process, "<init>", "(Lorg/simgrid/msg/Host;Ljava/lang/String;[Ljava/lang/String;)V");
297 xbt_assert((constructor_Process != nullptr), "Constructor not found for class %s. Is there a (Host, String ,String[]) constructor in your class ?", argv[0]);
299 //Retrieve the name of the process.
300 jstring jname = env->NewStringUTF(argv[0]);
301 //Build the arguments
302 jobjectArray args = static_cast<jobjectArray>(env->NewObjectArray(argc - 1, env->FindClass("java/lang/String"),
303 env->NewStringUTF("")));
304 for (int i = 1; i < argc; i++)
305 env->SetObjectArrayElement(args,i - 1, env->NewStringUTF(argv[i]));
306 //Retrieve the host for the process.
307 jstring jhostName = env->NewStringUTF(MSG_host_self()->get_cname());
308 jobject jhost = Java_org_simgrid_msg_Host_getByName(env, nullptr, jhostName);
309 //creates the process
310 jobject jprocess = env->NewObject(class_Process, constructor_Process, jhost, jname, args);
311 xbt_assert((jprocess != nullptr), "Process allocation failed.");
312 jprocess = env->NewGlobalRef(jprocess);
313 //bind the process to the context
314 const_sg_actor_t process = MSG_process_self();
316 context->jprocess_ = jprocess;
317 /* sets the PID and the PPID of the process */
318 env->SetIntField(jprocess, jprocess_field_Process_pid, static_cast<jint>(MSG_process_get_PID(process)));
319 env->SetIntField(jprocess, jprocess_field_Process_ppid, static_cast<jint>(MSG_process_get_PPID(process)));
320 jprocess_bind(jprocess, process, env);
322 run_jprocess(env, context->jprocess_);
329 /** Run the Java org.simgrid.msg.Process */
330 void java_main_jprocess(jobject jprocess)
332 JNIEnv *env = get_current_thread_env();
333 simgrid::kernel::context::JavaContext* context =
334 static_cast<simgrid::kernel::context::JavaContext*>(simgrid::kernel::context::Context::self());
335 context->jprocess_ = jprocess;
336 jprocess_bind(context->jprocess_, MSG_process_self(), env);
338 run_jprocess(env, context->jprocess_);